My advice: make a GH-Pages page at docs.sublimetext.com, and make it a public repo on GitHub. This way, we can all add small changes and additions to the documentation, which removes some of the burden to you, the developer of ST2.

Indeed a public page for documentation would be decent. There's a lot of bits and pieces out there, and people that experiment to figure things out. At the very least it would give a base for Jon to expand on (provided that it meets expectations/style). Worst case scenario it gets discarded later in favor of something he does. In the meantime it would be a collaborative effort to fill in the gaps. Could be worth it.